%%%-------------------------------------------------------------------
%%% @author kk
%%% @copyright (C) 2024, <COMPANY>
%%% @doc
%%%
%%% @end
%%% Created : 18. 7月 2024 11:23
%%%-------------------------------------------------------------------
-module(digui).
-author("kk").

%% API
-export([start/0, len/1]).

len([]) -> 0;
len([_ | T]) -> T.

start() ->
  Len = len([1,2,3]),
  io:fwrite("~w", [Len]).